依赖倒置原则是什么?如何在 C# 中实现?
csharpserver side programmingprogramming更新于 2025/10/16 3:22:17
高级模块不应该依赖于低级模块。两者都应该依赖于抽象。抽象不应该依赖于细节。细节应该依赖于抽象。该原则主要关注的是减少代码模块之间的依赖关系。
示例
依赖倒置之前的代码
using System;
namespace SolidPrinciples.Dependency.Invertion.Before{
public class Email{
public string ToAddress { get; set; }
public string Subject { get; set; }
public string Content { get; set; }
public void SendEmail(){
//Send email
}
}
public class SMS{
public string PhoneNumber { get; set; }
public string Message { get; set; }
public void SendSMS(){
//Send sms
}
}
public class Notification{
private Email _email;
private SMS _sms;
public Notification(){
_email = new Email();
_sms = new SMS();
}
public void Send(){
_email.SendEmail();
_sms.SendSMS();
}
}
}
依赖倒置后的代码
using System.Collections.Generic;
namespace SolidPrinciples.Dependency.Invertion.Before{
public interface IMessage{
void SendMessage();
}
public class Email: IMessage{
public string ToAddress { get; set; }
public string Subject { get; set; }
public string Content { get; set; }
public void SendMessage(){
//Send email
}
}
public class SMS: IMessage{
public string PhoneNumber { get; set; }
public string Message { get; set; }
public void SendMessage(){
//Send Sms
}
}
public class Notification{
private ICollection<IMessage> _messages;
public Notification(ICollection<IMessage> messages){
this._messages = messages;
}
public void Send(){
foreach (var message in _messages){
message.SendMessage();
}
}
}
}
